expected: |
  2,1,Megan Berry
  6,2,Bella Tucker
  7,2,Ryan Metcalfe
  8,2,Max Mills
  9,2,Benjamin Glover
  16,7,Piers Paige
  17,7,Ryan Henderson
  18,8,Frank Tucker
  19,8,Nathan Ferguson
  20,8,Kevin Rampling
query: |
  -- https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-recursive-query/.
  WITH RECURSIVE subordinates AS (
    SELECT employee_id, manager_id, full_name
    FROM 'Employees1.csv'
    WHERE employee_id = 2
    UNION
    SELECT e.employee_id, e.manager_id, e.full_name
    FROM 'Employees1.csv' AS e
    INNER JOIN subordinates AS s ON s.employee_id = e.manager_id
  )
  SELECT * FROM subordinates;
